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Chapter 25: Problem 81

One of the following elements has eight naturally occurring stable isotopes. We should expect that one to be (a) \(\mathrm{Ra} ;\) (b) \(\mathrm{Au} ;\) (c) \(\mathrm{Cd} ;\) (d) Br.

Short Answer

Expert verified
The element among Ra, Au, Cd, and Br that has eight naturally occurring stable isotopes is Cadmium (Cd).

Step by step solution

01

Identify the number of stable isotopes for Radium (Ra)

Radium (Ra) has no naturally occurring stable isotopes. All its isotopes are radioactive, meaning they decay over time releasing radiation.
02

Identify the number of stable isotopes for Gold (Au)

Gold (Au) has only one stable isotope, which is \( \text{Au-197} \).
03

Identify the number of stable isotopes for Cadmium (Cd)

Cadmium (Cd) has eight naturally occurring stable isotopes: Cd-106, Cd-108, Cd-110, Cd-111, Cd-112, Cd-113, Cd-114, and Cd-116.
04

Identify the number of stable isotopes for Bromine (Br)

Bromine (Br) has two naturally occurring isotopes, Br-79 and Br-81.

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Most popular questions from this chapter

What is the age of a piece of volcanic rock that has a mass ratio of argon- 40 to potassium- 40 of \(2.9 ?\) The half-life of potassium-40 by \(\beta\) decay is \(1.248 \times 10^{9} \mathrm{y}\) and by electron capture \(t_{1 / 2}=1.4 \times 10^{9} \mathrm{y}\).

Write equations for the following nuclear reactions. (a) bombardment of \(^{238} \mathrm{U}\) with \(\alpha\) particles to produce \(^{239} \mathrm{Pu}\) (b) bombardment of tritium ( \(^{3} \mathrm{H}\) ) with \(_{1}^{2} \mathrm{H}\) to produce \(^{4} \mathrm{He}\) (c) bombardment of \(^{33} \mathrm{S}\) with neutrons to produce \(^{33} \mathrm{P}\).

Discuss briefly the basic difficulties in establishing the physiological effects of low-level radiation.

The immediate decay product of element 118 is thought to be element \(116 .\) Write a complete nuclear equation for this reaction.

Complete the following nuclear equations. (a) \(\frac{23}{11} \mathrm{Na}+? \longrightarrow_{11}^{24} \mathrm{Na}+_{1}^{1} \mathrm{H}\) (b) \(_{27}^{59} \mathrm{Co}+_{0}^{1} \mathrm{n} \longrightarrow_{25}^{56} \mathrm{Mn}+?\) (c) \(?+_{1}^{2} \mathrm{H} \longrightarrow_{94}^{240} \mathrm{Pu}+_{-1}^{0} \beta\) (d) \(^{246} \mathrm{Cm}+? \longrightarrow_{102}^{254} \mathrm{No}+5_{0}^{1} \mathrm{n}\) (e) \(^{238} \mathrm{U}+? \longrightarrow_{99}^{246} \mathrm{Es}+6 \frac{1}{0} \mathrm{n}\)
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